J. Environ. Nanotechnol. Volume 2 (2013) 46 - 52 pp. ISSN (Print) : 2279 – 0748 ISSN (Online) : 2319 - 5541 doi:10.13074/jent.2013.02.nciset38

Assessment of Water Quality and Eutrophication of Lakes

Omkar Singh1, C.K. Jain

National Institute of Hydrology , Roorkee, .

Abstract

In this study, water quality and eutrophication aspects of Mansar, Surinsar, Tsokar, Tsomoriri and Renuka lakes have been discussed. The water quality parameters were compared with BIS standards for drinking purposes. The values of physico-chemical water quality parameters for Mansar and Surinsar lakes ( Division) were found within the desirable limits except low DO in hypolimnion. Whereas, the values of physico-chemical parameters for Tsomoriri and Tsokar lakes ( region) were found beyond limits having much higher concentration of pH, total dissolved solids, total hardness, chloride, calcium, magnesium. The water quality of shown higher concentration of magnesium, iron, manganese, lead, total coliform, faecal coliform and low DO in hypolimnion. The eutrophication status assessed on the basis of phosphate concentration show eutrophic condition of Mansar, Surinsar, Tsomoriri and hyper-eutrophic condition of Tsokar and Renuka lake. The results indicate that efforts are required to lower the existing eutrophication levels by adopting conservation measures for the lakes.

Kewords : Carlson’s TSI, Eutrophication, Lake, Water Quality, Western Himalayas.

1. INTRODUCTION requirements, cultivation on mountainous catchments coupled with indiscriminate use of The Himalayas are endowed with chemical fertilizers, insecticides and pesticides has hundreds of relatively smaller fresh water lakes, also enhanced problem of water quality degradation which used as natural centers of civilization and and eutrophication of water bodies. A large scale to cater the civilian needs. Many lakes are unique fish mortality often observed in most of the ecosystems and valuable from the historical, Himalayan lakes during winter and posing threat cultural, biological and socio-economic point of to ecological imbalances in the region. view. They serve variety of purposes like- drinking, irrigation, recreational, aqua-culture, etc. The Ramsar Convention on wetlands has However, with the exponential growth of notified 26 lakes/wetlands as international population in India, the land and water resources importance in India. Of them, six are located in are facing a tremendous pressure and the Western Himalayan Region namely, Renuka Himalayannatural resources are no exception to this (H.P.), Mansar-Surinsar, Tsomoriri, Wular and fact. Consequently, intensive agricultural practices, Hokera wetlands in Jammu & Kashmir. In this encroachments up to the lakeshore, disposal of solid study, water quality and eutrophication status has wastes, and discharge of domestic and industrial been assessed for five Himalayan lakes (Renuka, wastes have posed a serious problem of water quality Mansar, Surinsar, Tsomoriri and Tsokar lakes). degradation. The felling of trees for wood/energy 2. STUDY AREA OmkarSingh E-mail : [email protected] The present study deals with the lakes 47 Omkar Singh et. al./ J. Environ. Nanotechnol., Vol. 2 , 46-52, (2013)

located in the State of Jammu & Kashmir (Mansar, placed in the priority list of lakes, which required Surinsar, Tsomoriri, Tsokar) and immediate attention for restoration under the title (Renuka) in the Western Himalayas. Tsomoriri and “Management of Lakes in India”(Reddy & Char, Tsokar lakes fall under Ladakh Region having cold 2004). The lake rests in a long valley and the desert type climate with annual rainfall in the order surrounding slopes are covered with a variety of of about 100 mm. The Mansar and Surinsar lakes vegetation and thick woods. The supply of the lake are situated in the Lower Siwalik (Jammu Region). is through nallahs draining the catchement and receives fresh water through rain over probably numerous underlying springs. The the lake basin area and large number of information of the lakes under this study are given subterranean springs within the base of the lake. in Table 1. The rain water flows into the lake through overland flow. Climatically, the Jammu region falls under 3. REVIEW the subtropical zone and average annual rainfall is 1500 mm with air temperature variation from 30 A number of studies have been reported C(minimum) in winter to 430 C (maximum) during in the area lake investigations (Zutshi, 1989; peak summer. Omkar & Sharma, 1994-95; Jain et al., 1999, Kumar et al. 1999a, Kumar et al. 1999b; Das and The Renuka lake is one of the natural Dhiman, 2003; Shewa, 1998, Rai et al; 2006, wetlands located in the Sirmour district of the 2007). Physico-chemical and biological Himachal Pradesh. The Renuka lake is a very characteristics of Mansar lake have been studied important tourist & religious place of the HP. Being by Zutshi (1985, 1989), Chandra Mohan (1992) situated in the main range of lesser Himalayas, this and Gupta (1992). Zutshi et al. (1980) reported wetl and is of special importance from bio- that lakes of Jammu and Kashmir are different in diversitypoint of view. The National Wetland their morphology and thermal behaviour and vary Management Committee of the Ministry of from sub-tropical monomictic to dimictic type. Rai Environment & Forests (Govt. of India) has et al. (2001) performed studies on bathymetry, recognized the Renuka lake as one of important sedimentation rate and water quality of the Mansar. wetlands of the country, which requires conservation and management on priority basis However, studies on Renuka lake are (State Council for Science, Technology & reported limited and include mainly morphometry Environment, Govt. of HP). This lake also finds and water quality aspects lake (Singh et. al, 1987;

Table 1. General information about the lakes under this study Omkar Singh et al. / J. Environ. Nanotechnol., Vol. 2 , 46-52, (2013) 48

Anonymous, 1996, 2004). as per BIS (IS 10500: 1991) for drinking purposes. The data of phosphate obtained in different years 4. MATERIAL & METHODS was used to study eutrophication status of these lakes on the basis of Trophic State Index (Carlson, 1977). In the present study, water quality data of the Mansar, Surinsar (Jammu Region), Tsomoriri 5. RESULTS AND DISCUSSION and Tsokar lakes (Ladakh Regions) of Jammu and Kashmir and Renuka Lake (H.P.) has been used. Water Quality The data includes mainly: pH, EC, TDS, DO, Ca,

Mg, Na, K, Alkalinity, HCO3, Cl, SO4, NO3, PO4, The variation of water quality parameters F, Hardness. In-situ measurements of Temperature, of different lakes under this study are given in Table pH and EC were also made using portable 2. The study has shown pH values greater than 7.0 instruments. Standard Water Sampler was used for all lakes under this study, which indicate fordepth wise sampling in the Mansar Lake. The alkaline nature of lake water. The average values analysis of the water samples was carried out using of pH of Tsomoriri (8.96) and Tsokar (8.82) lakes standards procedures (APHA, 1985/Jain & Bhatia, were found beyond permissible limits for drinking 1987). The water quality of the lakes was evaluated purposes. The values of TDS (2272 mg/l), TH (3161

Table 2. Water quality assessment of Mansar, Surinsar, Tsomoriri and Tsokar lakes 49 Omkar Singh et. al. / J. Environ. Nanotechnol., Vol. 2 , 46-52, (2013)

mg/l), Mg (747 mg/l) in Tsomoriri lake and TDS The water quality of the Renuka lake was (40659 mg/l), TH (19743 mg/l), Cl (9028 mg/l), also assessed as per BIS norms of drinking water calcium (1300 mg/l), magnesium (4010 mg/l) in quality (BIS-10500: 1991). The results are given Tsokar lake were obtained extremely higher than in Table 3, which show mean values of some water the prescribed desirable limits for drinking quality parameters beyond desirable limits viz. purposes. magnesium (mean 41 mg/l against limit of 30 mg/ l), total coliform (mean 61 MPN/100 ml against The results indicats wide range of limit of 10 MPN/100 ml), faecal coliform (mean variation of water quality parameters for the lakes 50 MPN/100 ml against limit of zero MPN/100 of Ladakh Region in comparison to the lakes ml)), iron (mean 1.49 mg/l against limit of 0.3 mg/ of Jammu and Kashmir Regions. It may be l ), lead (mean 0.35 mg/l against limit of 0.05 mg/ primarily due to presence of evaporites in lakes l), manganese (mean 0.87 mg/l against limit of of Ladakh division attributed in cold desert 0.10 mg/l ) and cadmium (mean 0.01 mg/l against type climates GSI (1977) has also reported limit of 0.01 mg/l ), respectively. However, pH, exceptionally v e r y high v a l u e s of salt total hardness, TDS, calcium, sulphate, fluoride, containing constituents in the Ladakh division. alkalinity, DO and BOD were also found to be

Table 3. Water quality assessment of the Renuka lake for drinking purposes Omkar Singh et. al. / J. Environ. Nanotechnol., Vol. 2 , 46-52, (2013) 50

exceeding the desirable limits in few water Index (Carlson, 1977) using phosphate data. The samplesof the Renuka lake under this study. eutrophication of Renuka lake was assessed on the Therefore, the Renuka lake water requires ap- basis of phosphate data collected during 2006-2008 propriate water treatment measures before use (Fig. 2). The results are given in Tables 4, which for drinking purpose. indicated eutrophic condition of Mansar, Surinsar and Tsomoriri lakes. Whereas, Tsokar and Renuka lake were found under hypertrophic condition. The results indicate that there is a need for taking appropriate actions for conservation and restoration of the lakes.

6. CONCLUSION

The study has shown a majority of physico-chemical parameters fall within range for drinking and irrigation purposes in the Mansar and Surinsar. Whereas, water quality for the lakes of Ladakh region (Tsomoriri and Tsokar) shows extremely higher concentration of salts attributed due to prevailing cold desert type climate having Fig. 1: Frequency plot of phosphate concentration low annual rainfall in the order of about 100 mm. in Renuka lake (2006 to 2008) Accordingly, the water quality being debar from Eutrophication Status dilution showing unusually very high concentrations of some water quality parameters The eutrophication is usually measured viz. pH, Total Dissolved Solids, Total Hardness, using one of several trophic state index (TSI) of Chloride, calcium, magnesium in Tsomoriri and algal weight (biomass): water transparency (Secchi Tsokar lakes of Ladakh region. The observed Depth, TSI-SD), algal chlorophyll (TSI-Chl), and water quality of the Renuka lake was compared with total phosphorus (TSI-TP)(Carlson, 1977). In the the BIS norms of drinking water quality, which present study, eutrophication status of lakes has show mean values of few water quality been studied based on Carlson’s Trophic State parameters beyond desirable limits for magnesium,

Table 4. Eutophication status of the lakes 51 Omkar Singh et. al. / J. Environ. Nanotechnol., Vol. 2 , 46-52, (2013)

total coliform, faecal coliform, iron, lead, Chander Mohan, 1993. Limnology of lake Mansar manganese and cadmium, respectively. The data with particular reference to primary producers, of DO indicated that hypolimnion of the Himalayan Unpublished Ph.D Thesis, Jammu University, lakes remain mostly under anoxic condition. The Jammu, 215 pp. lakes also remain stratified duringsummer and Carlson, R.E. 1977. A trophic state index for lakes. mixed during winter months. The eutrophication Limnology and Oceanography. 22:361-369. status reveals Mansar, Surinsar and Tsomoriri Das, B.K. and Dhiman, S.C. (2003). Water and lakes under eutrophic, Tsokar and Renuka lakes sediment chemistry of higher Himalayan lakes under hyper-eutrophic condition. The results in the Spiti Valley: Control on weathering, indicate that there is a need for taking provenance and tectonic setting of the basin, appropriate actions for conservation and restoration J. Env. Geol., Vol. 44, No. 6, pp. 717-730. of the lakes for improving water quality and Handa, B.K., Kumar, A., and Bhardwaj, R.K., lowering the level of eutrophication. 1991. Studies on , Srinagar, J&K, eutrophication studies, Bhujal News, CGWB, ACKNOWLEDGEMENT 6(4). Jain, A., Rai, S.C., Pal, J. and Sharma, E. (1999). The authors are grateful to Er. R. D. Hydrology and nutrient dynamics of a sacred Singh, Director, National Institute of Hydrology, lake in Sikkim Himalaya, J. Hydrobiologia, Roorkee, for kind permission to submit this paper 416, pp. 13-22. for the present seminar. Authors are also thankful Jain, C.K. & Bhatia, K.K.S., 1987. Physico to all the concerned officers/staff of WHRC, chemical analysis of water and waste water, Jammu/EHD for contribution during field/lab UM-26, National Institute of Hydrology, investigations. Roorkee. Kumar, Bhism, Jain S.K., Nachiappan, Rm. P., Rai, REFERENCES S.P., Kumar Vinod, Dungrakoto, V.C. and Rawat, Y.S., 1999. Hydrological studies of lake APHA, 1985. Standard methods for the Nainital, Kumaun Himalayas, , examination of water and wastewater, Final Project Report, National Institute of American Public Health Association. Hydrology, Roorkee. Washington D.C. Kumar, Vijay, Rai, S.P. and Singh, Omkar, 2006. Anonymous, 1999. Digest of Statistics 1997-98, Water Quantity and Quality of Mansar lake in Directorate of Economics & Statistics, Planning the Himalayan Foothills, India, Intl J. of Lake and Development Department, Government of & Reservoir Management, Vol. 22 (3), pp. 191- Jammu & Kashmir. 198. Anonymous, 1999a. Wetlands of India, Space Omkar and Sharma, 1994-95. Water Quality Application Centre (ISRO), June 1998. Studies of in Jammu Region, Anonymous, 1996. Report on Water Quality Report -CS (AR) 157, NIH, Roorkee, pp. 50 Monitoring of Renuka Lake (unpublished), H.P. Rai, S.P., Kumar, V., Singh, O., Kumar, B. & Jain, State Pollution Control Board, Shimla. S.K., 2001. “Limnological Study of the Mansar Anonymous, 2004. Report on Water Quality Lake, District Udhampur, J&K”, Final Project Monitoring of Renuka Wetland (unpublished), Report, NIH, WHRC, Jammu Cantt.. H.P. State Environment Protection & Pollution Rai, S.P., Kumar, V., Singh, O., Kumar, B. & Jain, Control Board, Shimla. S.K., 2006. “Bathymetry, Sedimentation Rate and BIS, 1991 (IS 10500: 1991). Drinking water- Physico-Chemical Characteristics of Mansar specifications, Bureau of Indian Standard Lake in the Himalayan Foothills, J&K, India, J. Institute, New Delhi. GSI, Vol. 67, pp. 211-220. Omkar Singh et. al. / J. Environ. Nanotechnol., Vol. 2 ,46 - 52, (2013) 52

Rai, S.P., Kumar, V., Singh, O., Jain, S.K., 2007. Zutshi, D.P., 1985. The Himalayan lake ecosystem, “Hydrochemical Characteristics of Mansar Lake, In: Singh J.S. (eds.) Environmental J&K in India, J. IE (I)-EN, Vol. 88, pp. 16-22. Regeneration in Himalaya: Concept and Ramsar, 2008. Cited from Proposed Theme of Strategies, The Central Himalayan World Wetland Day 2008, Ramsar Environmental Association and Gyanodaya Convention on Wetlands (www.ramsar.org). Prakashan, Nainital, pp. 325-342. Shewa, W. A. 1998. Eutrophication analysis of Zutshi, D.P., 1989. 25 Years of ecological research lakes of Kumaun region, M.E. Dissertation, on the lakes of North-Western Himalaya, In: Dept. of Civil Engg., IIT, Roorkee, pp. 92. Singh J.S. and Gopal I.B. (eds.) Perspective in Singh R., Mishra, S.H., Shyamananda, R.K., Ecology, Jagmaudar Book Agency, New Delhi, Sharma, G., Mahajan, I. & Aggarwal, B.K. pp. 49-65. 1987. Morphometry and catchment study of Zutshi, D.P., Subha, B.A., and Khan, M.A., 1980. Renuka lake, Himachal Pradesh, India, with a Comparative limnology of nine lakes of Jammu note on its flora and fauna, In: Western and Kashmir Himalayas. Hydrobiologia, 72, Himalayas, Vol. II (Eds Pangtey, Y.P.S. and pp. 101-112. Joshi, S.C.), Gyanodaya Prakashan, Nainital, pp. 639-649.